131212232 has 8 divisors (see below), whose sum is σ = 246022950. Its totient is φ = 65606112.

The previous prime is 131212223. The next prime is 131212253. The reversal of 131212232 is 232212131.

It can be written as a sum of positive squares in only one way, i.e., 93586276 + 37625956 = 9674^2 + 6134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 131212232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200757 + ... + 8200772.

Almost surely, 2^131212232 is an apocalyptic number.

It is an amenable number.

131212232 is a deficient number, since it is larger than the sum of its proper divisors (114810718).

131212232 is a wasteful number, since it uses less digits than its factorization.

131212232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16401535 (or 16401531 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 131212232 is about 11454.7907881375. The cubic root of 131212232 is about 508.1494280071.

Adding to 131212232 its reverse (232212131), we get a palindrome (363424363).

The spelling of 131212232 in words is "one hundred thirty-one million, two hundred twelve thousand, two hundred thirty-two".